Ice-cream freezer.



F. TYSON.

ICE CREAM FREEZER.

APPLICATION FILED MAR. 23. 1915.

1 210 727 Patented Jan. 2,1917. l 7

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UNITED STATES PATENT @FETCH FRANK TYsoN, or cAN'roN, oiaro.l

` ICE-CREAM FREEZER.

To all whom may concern:

Be it known that I, FRANK Ohio, :have invented certain vImprovements in Ice-Cream Freezers, of which the following is a specification.

My 'invention relates to that class of ice cream freezers in rwhich a cylindrical freezing vessel is provided with internal mechanism for beating, stirring and agitating the mass of cream during the freezing operation, the object of my inventionbeing to increase the eectiveness of said beating, stirring or agitating operation as compared with machines at present in use.. This object I attain in the manner hereinafter set forth, reference being had to the accompanying drawing, in which- Figure 1 is a longitudinal section of la horizontal ice cream freezer constructed inaccordance lwith my invention; Fig. 2 is a transverse section on the line @#00, Fig. 1; Figs. 3 and 4 are perspective views on a larger scale than Figs. 1 and 2 showing certain features of construction not clearly illustrated in the other figures, and Fig. 5 is a longitudinalsectional view illustrating a special means of accomplishing the object of f my invention.

In the drawing I have shown my invention as applied to a horizontal ice cream freezer but my invention is not limited thereto but can be applied to ice cream freezers generally. y

,In Figs. l and 2, 1 represents the cylindrical freezing vessel which is contained within a cylindrical casing 2, the spiral chamber 3 intervening between the two for the flowl of the refrigerant, and the casing 2 being surrounded by an outer casing 4 inclosing a chamber 5 for the receptionl of non-conduct- The construction of the freezing vesseland its casing, is, however, immaterial to my invention and may be modified if desired. The freezing vessel is closed at its opposite ends by means of heads 6 and 7, the head 7 in the present instance having formed in it a lling and observation opening 8 and the valved discharge opening 9,

and each head has a bearing for the drivingA shaft 10 ofthe machine, which carries inside of the freezing vessel a rectangular frame or dasher comprising end bars 11 and longitudinal bars 12. This frame also carries beating, stirring and agitating blades 13 (which will hereinafter, for convenience, be referred Specification of Letters Patent.

TYsoN, a citizen of the United States, residing in Canton,

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v Application led March 23, 1915. Serial No. 16,383.

to l simply as beater blades)these blades in the freezer shown in the drawing being disposed in two sets, one'on each side of the axis ofthe shaft 10, the blades of each set being arranged equi-distantly from end to end 'of the dasher and each beater blade being pivoted at its inner end in the shaft 10v and at its outer end in one of the bars 12 of the dasher so that the blade is free to assume different angles in respect to its plane of rotation With the dasher. Simultaneous rocking movement of all the blades of a series is effected by means of a cam structure 14 on the'head 6 of the freezer, thiscam structure actingupon rollers 15 carried by longitudinal rods 16 which have eyes 17 engaging projecting studs 18 on the beater blades 13, as shown in'liig. 4. Supposing that the freezing vessel and its opposite heads are stationary and the shaft 10 rotates, the rods 16 will rotatewith the dasher and they engagement of the rollers 15 with the fiXed cam 14 on the v in turn be transmitted to the beater blades 13 and will causeY the same to rock on their axes so as to constantly shift the angular position of each blade in respect to its plane of rotation with the dasher. I thus not only avail myself of the beating action due to the rotation of the blades with the dasher but also provide a further beating action due to the constant vibration of the blades when they rotate, the result being a maximum volume of frozen product in proportion to the volume of the original charge. As the cream freezes on the inner surface of the freezing vessel 1 it must be removed therefrom and for this purpose the dasher is usually provided with scrapers which contact with the inner surface of the freezing vessel and remove the frozen volume of cream therefrom as fast as it is formed thereon. Two of such Scrapers are shown in the drawing, mounted, respectively, in the opposite bars 12 of the dasher, each of these Scrapers consisting of a wedge-shaped blade 19 interposed between the bar-12 and the inner face of the freezing vessel, this blade being of such width that it is compelled to assume a forwardly inclined position, as shown in Fig. 2. The outer edge of the blade is sharpened so as to properly perform its scraping duty but the inner edge or butt of the blade is thickened and rounded and is seated in the concave outer face of the dasher bar 12, displacement of the blade being prevented by means of-'pins -201atthe i tion in Which the cam le is disposed on the outeryside of the :head 6: :instead of ionI thefl innersidei of theasame, .the shaft 1\0:-'being{y tubular andy being provided'.1Withfmeans.for

the. guidance; of a .longitudinal rack. bar `2lwhich has racks 22 engagingwith pinions234 mountedupon the inner. endsl-of the `inner` pivot-studs of the beater 4blades v13 and'con-# ,tained Within the holloW.shaft^-10,vone .enda

of the rack bar,2l. having approjecting stud 24 Whichengages .the cam groove :formed in? veither face of the. cam. 14,'.fasi shown:in,Ffig..V 5, .whereby as theshaftl0 is rotatednflongiI tudinal reciprocation= Will. be imparted to'I thek rack bar;` 2l with fconsequent vback and nforthf movements ofpartial-rotation of thefpinionsIA 23-,and back and. forth vibrations of/thew beaterblades .While I :prefer ibo-extend the central rotating shaft l() from endn'to'` .end of the .dasher -,and-;^to=fpivotally mount the innerendsfof the beater blades f-.1`3 in this portionfzof the shaft such construction 'isnot'i necessary to g my invention, and this portion: of the shaftfmaypif adesired, .bef dispensedff l With, ,in which case the .oppositely disposed bladesiof Figs. .1and:2;v be connected, j asshovvn by dotted lines in Fig. 2, the singleI blade thus produced being. pivotally fm'ount- .ed in the `.opposite fbarslZiof the dasher, or, 1 on -the other hand., ,Whennthe shaftlO,extends'fA fromend to end of theffreezervthe =beater blades may .be mountedyentirely.'upon the l same. -While I also' prefer :to mount thevi-f brating beater blades .upon a rotating dasher this feature alsofis not amatter of necessity;- 1' as Imy invention can, if desired-be embodiedl the' samerelati-onftofthe beaterblades vastthe in a freezerfinavhich thev dasher is station-r ary and the-.rotative movement isimparted to the freezing vessel.

I claim:

in the vangular positionzof saidi--beaterblade on each rotation of the rotating element of the freezer. f v

2.@ .An ice-cream tWo subscribing Witnessesi;y -f z freezer having affreezing-Yf. vessel and a pivoted TOW-sof beater blades therein, one of said elements being rotatable n in respect to theother, and automatic means whereby, -fclurig each rotation of the rotatable element, reversal in the angular posi- 60 tion of'eaeh of the beater blades of the row Will be effected. n i

iAn`r 'ice' cream freezer having'v a freezing vessel-fandadaslrertherein, one rotatable in respect to the other, said dasher having longitudinal bars, pivotallyimountedlbla'des and automatic means 'whereby duringthe aforo saidi rotative vmovement Vsaii'd' beater' blades Will'be'cauSedfto v'svving uponV theirffaXes. f" l' 4.1 An fice cream Lf'reezer' 'havi-ng "-fr'eez-y .70 ing vessel and a dasher,one'ro'tatable in re-2V spect' tof vthe' other, and said dasher "having longitudinal bars, with 'f beater blades xpivot# allymounted `in said longitudinall bars, and automaticy meansvvhereby5 during the *rot'a-V 7 5 tive movement, said beater blades. are caused to swing upontheir pivots* i" .5. Anf-ice ycream freezer having"affreez'"' ing..l y vessel and a dasher,-o`ne` rotatable inVV respect `;to^the athen-said dasher Ihaving 80 centrali shaft, longitudinal Y bars, and: "sWing-f ing beaters: pivotally mountedI `betvveen "theff two, and automatic means Wherebyir'durin'g" the aforesaid rotative movement, saidblades arel caused to swing uponftheirpivots. A'85 -6l An *ice cream'ffreezer 1 having a swings ing beater bladerfandla freezingfvessel,1 one rotatable ain-resp`ect -tothev other, a -bar connected-to said swinging beater blade," and a" circular cam having the samer'irelati'on to 390 the beater bladeasgthei freezing .-vessel, said' v cam'Y acting fdirectlyf upon said balso l as to effect `reversal inthe `"angular 'positionof 'thef-4 beater blade on each rotation ofthe rotating element offthe'machine' Y e4 f i 95 7. An Aice creamfreezerfhaving-"afroW 'ofA swinging beater blades and a freezing vessel," one of sadfvelementsbeing rotatablein-re" spect to the other, a bar connecting'the: bladesoftherowyand afcircular'camhaving 100 freezing lrvessel; said caniv acting :directly uponv saldi-bar so-as tohcause` a *reversal* A E inthefangularposition'of each of the'beaterY l. An ice cream .freezer .having :1f/freezing vessel vand a pivoted-beater blade-therein,r one rotatable in.respect tothe other, Withf means for automatically effecting reversal:j

blades onjearChrOi-,aton of the ment ofthe machinarotativeele- In" testimony whereof," have signedY my* 1 name to this specification-,in the presence of lFRANK vVVitnesses-fzl 2 RALPH AMBER, CLARA I IERMArIiL TYSON.

Copies of this patent may be obtained forl v-.centsl ea'c'h, by' addressing the Commissioner o`f Patents Washington, D. 0. Y Y 

